Improvement in paper-bag machines



. 4Sheets--Sheet 1. W. F. WEST.

Pal-,par Bag-Machines.

PatentedMay 26.18.74.

f" IMJ.

W. F. WEST. Paper Bag-Machines.

Patented May 26,1874.

4Sheets--Sh`eet3. W. F. WEST.

Paper Bag-Machines.

No.15l258, Patented May 26,1874.

l Paper Bag-Machines.4 No,l5,258. Patented May 26,1"87/1.

cfu/M Wi A YVILLIAM F. YVEST, OF HAVERSTRAW, ASSIGNOR OF ONE-HALF HIS RIGHT `TO THOMAS N. AVERY, OF GOLD SPRINGS, NEW YORK.

HWPROVEMENT IN PAPER-BAG MACHINES.

Specilication forming part of Letters PatentNo. ll, dated May 26, 1874; application filed December 5, 1373.

To all whom it may concern:

Beit known that I, WILLIAM F. Wnsr, of Haverstraw, Rockland county, State of New York, have invented an Improved Machine for Making Paper Bags, of which the following is a specitication:

rlhe object of my invention is to make a seamless-bottom paper bag from roll or sheet paper having the fiber or grain of the paper ruiming transversely of the length of thc bag, whereby the bag will be better able Vto bear the lateral strain upon it when filled with sugar, flour, or other articles than if the fiber of the paper run lengthwise of the bag, as they are commonly made; but te describe my invention more particularly, I will refer to the accompanying drawings forming a part of this specification, the saine letters of reference, wherever t-hey occur, referring to like parts.

Figure l, Sheet 1, is a side elevation of the machine. Fig. 2, Sheet` l, is a plan view of the same. Fig. 3, Sheet 2, is an end view of the same.v Fig. 4, Sheet 2, is a longitudinal sectional view of machine through the line x fr, Fig. 2, Sheet l. Fig. 5, Sheet 3, is a plan view of the lower creasing, pasting, and carrying rollers and folders. Fig. 6, Sheet 3, is a detached sectional view of the creasing-rollers. Fig. 7, Sheet 3, is a detached view of the pasting-rollers. Fig. 8, Sheet 3, is a detached view of the paper-cutters. Fig. 9, Sheet 3, is a detached view of the paperdoubler. Fie. l0, Sheet 3, is an edge View of the paper to form the bag, showing the overlap to close its Vside seams, and the edge ofthe folders. Fig.

ll is a sectional view on line :c lof Fig. l.

Letter A represents the frame of the machine, composed principally of two side pieces. .Between these side pieces is arranged, in suitable bearings, a main propelling-shaft, B, having on its back end a cog-wheel, O, into which gears a face or bevel cog-wheel, D, on the end of a shaft, E, so as to rotate at right angles to the shaft B. The shaft E is secured in suitable bearings on the outer `face of the back side piece, and extends outward just beyond the front end of the machine. On its outer end is secured a crank or eccentric wheel, F, to the crank-pin G of which is attached two connecting-rods, H and I. The rod 1I works on a horizontal line, or nearly so, and connects,

at its outer end, to the lower end of a lever, J, working on a center-pin, K, secured to the end of the machine. To the upper end of the lever J is attached a feed ratchet-bar, L, to engage in a feed ratchet-wheel, M, on the end of the shaft of the paper-roller N, arranged axially parallel with the sides of the frame of the machine, so as to deliver the paper from the con tinnous roll of paper at right angles to the doubling, folding, creasing, and pasting motions of the machine for making the bag. rlhc object of delivering the p aper at right an gles te the rollers of the bag-forming devices is, iirst, for the purpose of utilizing thelongitudinal strength of the paper, as compared withits transverse strength, owing to the fact that the fiber of which continuous rolls of paper are made run or lic more freely len gthwisc of the continuous sheet, and therefore will resist a greater eftbrt to tear it across the sheet of paper than will be required to tear it with the grain or lengthwise of the sheet 5 and as paper bags more generally split up and down their lengths when bcing lilled, because all machine-bags are made with the grain of the paper so running.

By my method of delivering the paper to the machine at right angles to its mode of forming the bag, the grain of the paper runs transversely of its length. Thus, while the two side seams strengthen it lengthwise, the

grains of paper strengthen it laterally.

The second object in view in delivering the paper to the bagforming rollers at right angles to their motion is, to make the bag with a seamless bottom, thus making the bag with two side seams to strengthen it lengthwise, and at the same time make the bag without any scrap or waste paper.

Letter O is a pressure-roller on the paperroller, and I is a spiral spring or other equivalent device for keeping the ratchet feed bai or rod L in gear with the ratchet-wheel M, to feed the paper intermittently into the machine as it is successively cut off by the serrated knives or cutters Q and R. rfhcse cutters are made with serra-ted edges, with the teeth on the stationary cutter Q alternating with the teeth of the movable cutter R, so that when the cutter-gate S (to which the cutter It is attached, and which gate is worked in guideways T, secured to the upper edge of the back piece of the frame A) is forced down by the levers U, V, and I, connecting with the crankpin Gr of the eccentric wheel or crank F, the serrated edges of the cutters will just pass each other, and thus sever the blank of paper to admit of its being folded or doubled to be made into the bag'. For the purpose of assist ing the cutters to sever the paper, the movable cutter It is made widest at its outer ends, so that they will strike the paper first, and thus, as it were, make a gradually-increasing cut to the middle part of the cutter. Another feature of these cutters is that they cut the blank of paper off on'two different lines from the middle part of them, with an oblique blank space, as shown at X, Fig. S, Sheet 3, connecting the two cutting-lines of the knives. The object of this formation ofthe cutters is, iirst, to cut the blank of paper so as to leave at opposite sides of the bag when doubled up on the line g3, Fig. 8, Sheet 3, an overlap of paper to make the side seams on the upper and lower sides of the bag c3, as shown in Fig. l0, Sheet S-that is, the overlap on one side of the bag being on the upper side of it, and the opposite overlap being on the under side of the bag; and, second, for the purpose of tapering off the ends of the overlap at the bottom of the bag, that it may be more securely pasted to prevent being torn loose by the exposure of an unpasted end, should such occur. lhen the blank of paper has been severed from the roll of paper it is delivered upon atable, e, covering the end of the machine in front of the cutters, and extends over the doubling, creasing, and pasting rollers a2, b2, and g2 and q, except at theintersection ofthe doubling-rollers, where it is slotted for the paper to be doubled and carried in between` the doubling-rollers. In

the drawings the half of the table to cover the' creasing and pasting rollers has been omitted for the purpose of showing the rollers and conguration of them. For the purpose of doubling the paper a striker-bar or paper-doubler, d?, is automatically and intermittently, at the proper time, made to fall upon the blank of paper on the table at the point of intersection of the doubling-rollers. By this means the paper c3, Fig. 4, is doubled down between the two rollers that they may seize hold of it to co1nplete the doubling of the bag to form the bottom of it. To operate the striker-bar it is attached, at its back end, to a vertical rod, c2, working in guideways f2 on the face of the cutter-gate, and having a lifting-shoulder, g2, thereon near its lower end, and a detent-notch, h2, at or near its upper end, to engage with a detent-latch or spring, i2, on the upper edge of the cross-head of the cuttergate frame T. Thus when the cutter-gate is elevated, the lower guideway f2 of the rod e2 comes in contact with the shoulder g2 and lifts the striker till the upper end of the rod engages with the detent spring i2, and is there held till the paper has been carried in upon the table and the gate descended to sever the paper, which instantly this severance of the paper has taken place,

.72, which are rotated by gearing with a cogwheel, k2, on the outer end of the main drivin wheel shaft Letters b2 are a pair of rollers for creasing the overlap at the sides of the bag, so that it will be readily and evenly folded by the folders on entering the groove or channel therein. rlhe creasers, as shown in Figs. 5 and 6, Sheet 3, are formed by a raised thread around one end of the upper and lower rollers and a channel or groove in the rollers opposite to the thread, and into which the raised thread matches. The object of this formation of the creasers is to crease the overlap paper at the sides of the bag in opposite directions-that is, as the overlap on each side of the bag is only on each half, the creaser on the back end of the upper roller breaks the paper so as to bend up and fold over upon the upper half of the bag, as shown at m2, Fig. l0, Sheet 3, while the creaser on the front end of the lower roller breaks the paper, so as to bend down and fold over upon the lower half of the bag, as shown at a2, Fig. l0, Sheet 3. Letters p2 and p3 are two overlap-fblders composed of a strip of metal (of a suitable width, according to depth of overlap of paper and length to complete the fold) folded lengthwise like a ilat tube, with an open side, terminating at the mouth in an expanded or funnel-shaped mouth, so that as the bag is carried forward between the creasing-rollers to the pasting-rollers q2 Q3 the overlappinedges of the paper will readily enter the mouths of the folders, and be bent over and down upon the sides of the bag. In the folder p2 the mouth is open upward, while in the folder p3 the mouth is open downward, as shown in Figs. 5 and l0, Sheet 3.

As will be obvious from an understanding of the special manner of making the bag with a seamless bottom, and cutting the blanks of paper so as to have no waste in leaving marginal overlaps to make the side seams, the arrangement of the folders, with their mouths opening as described, is essential to the practical operations of making the bae.

Just at the throat of the folders are arranged the paster-rollers q2 and g3, as shown in Fig. 7, Sheet 3. On the back end of the upper roller q2, and the front end of the lower roller g3, is formed endless paster rings r2, by cutting away the metal of the body of the rollers, so as to lea-ve the rings of metal on a line with the throat of the overlap-folders, upon which their peripheries impin ge. The object of these rings is to apply the paste to the overlap j ust in advance of the overlap folding down to enter the flattened part of the folder, so that as the sides of the bag are carried through the folders, the overlap will be thoroughly pasted upon the sides of the bae. To supplythe paste, reservoirs sz'and t2 are secured to the frame of the machine close in contact with the pasterrings. Thus the reservoir s2 supplies paste to the pastor on roller q2, from above it, by means of a slit in its lower edge, through which the pasterrin g projects into the body of the paste, and thus, as it rotates, carries off on its periphery sufcient paste for the purpose required, while the reservoir t2 supplies paste to the paster on the roller g3, from below it, by means of la slit in its upper side or ed ge, through which the paster-ring projects into the paste, to apply in the manner as before mentioned. 0f course it will be obvious that these pastelrin gs, though rotating in the slits in the pastereservoirs, are, nevertheless, intended to fit so closely to the edges of the slit as to prevent leakage of the paste, or oyerchargin g the peripheries of the rings. To regulate this latter operation, adjustable Scrapers or clearers are to be used, to regulate the flow of the paste according to density or capacity to flow. Letters az are two pairs of carrying-rollers, to take the bag through the tubular folders. To prevent the folders from being carried out of the machine by the rollers, their ends are channeled so as to permit the folders to lie in them below the feeding-surfaces of the rollers, and held in the channels by means of straps r2, looping around the channels of the lower rollers, and attached to the under side of the tubular folders. Letters 102 are a pair of com` presser-rollers at the `tail oi' the machine, designed, principally, for the compression of the pasted overlapping seams, and incidentally for the purpose of carrying the bag out of the machine. Letters y2 are a series of cog-wheels, on the axles of the lower rollers, for creasing, pasting, carrying, and compressing, as bei-ore mentioned, and intermediate carrying cogwheels, for transmitting a uniform rotary motion to the rollers, as aforesaid, by means of their gearing with the cog-wheels k2 on the main driving-shaft B.

Having now described my improvements, l will proceed to set forth what I claim and desire to secure by Letters Patent ofthe United States.

l. The combination of the web roll N, knife R, folding-rollers a?, and folding or striker bar d2, the said parts being so related that the feeding of the web of paper shall be at right angles to the folding, and the blank doubled in its transverse center, as above set forth.

2. The combination ofthe lifting-shoulder g2, detent-noteh h2, latchsprin g i2, with the strikerrod c2, cutter-gate S, and guide f2, substantially as described, and for the purposes set forth.

3. In combination with the folders p2 :and p3,

VILLIAM F. VEST.

Witnesses CHARLES L. BARRITT., Unas. l. DURHAM. 

